This is a spread from the book I am working on on Persian ceramics from the collection of the Asian Art Museum in San Francisco (I’m still waiting for final text). The object is a fritware conical bowl painted with “panel style” decoration in underglaze blue and black manganese (The Avery Brundage Collection, B60P1893).

Firt is a ground glasslike substance (I think potash and quartz were the main ingredients) that, added to clay, reduces its firing temperature, which is helpful for applying overglazes. It was used in West Asian pottery to produce a fine white base that imitated the quality of Chinese porcelain.

The bowl dates from the first half of the thirteenth century, and, according to the curators, may be from Kashan in Iran. Poetic verses in white on the black areas express longing for the absence of a beloved.

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